These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / hv / hv_utils_transport.h

diff --git a/kernel/drivers/hv/hv_utils_transport.h b/kernel/drivers/hv/hv_utils_transport.h
new file mode 100644 (file)
index 0000000..314c76c
--- /dev/null
+++ b/kernel/drivers/hv/hv_utils_transport.h
@@ -0,0 +1,51 @@
+/*
+ * Kernel/userspace transport abstraction for Hyper-V util driver.
+ *
+ * Copyright (C) 2015, Vitaly Kuznetsov <vkuznets@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT.  See the GNU General Public License for more
+ * details.
+ *
+ */
+
+#ifndef _HV_UTILS_TRANSPORT_H
+#define _HV_UTILS_TRANSPORT_H
+
+#include <linux/connector.h>
+#include <linux/miscdevice.h>
+
+enum hvutil_transport_mode {
+       HVUTIL_TRANSPORT_INIT = 0,
+       HVUTIL_TRANSPORT_NETLINK,
+       HVUTIL_TRANSPORT_CHARDEV,
+};
+
+struct hvutil_transport {
+       int mode;                           /* hvutil_transport_mode */
+       struct file_operations fops;        /* file operations */
+       struct miscdevice mdev;             /* misc device */
+       struct cb_id cn_id;                 /* CN_*_IDX/CN_*_VAL */
+       struct list_head list;              /* hvt_list */
+       int (*on_msg)(void *, int);         /* callback on new user message */
+       void (*on_reset)(void);             /* callback when userspace drops */
+       u8 *outmsg;                         /* message to the userspace */
+       int outmsg_len;                     /* its length */
+       wait_queue_head_t outmsg_q;         /* poll/read wait queue */
+       struct mutex outmsg_lock;           /* protects outmsg */
+};
+
+struct hvutil_transport *hvutil_transport_init(const char *name,
+                                              u32 cn_idx, u32 cn_val,
+                                              int (*on_msg)(void *, int),
+                                              void (*on_reset)(void));
+int hvutil_transport_send(struct hvutil_transport *hvt, void *msg, int len);
+void hvutil_transport_destroy(struct hvutil_transport *hvt);
+
+#endif /* _HV_UTILS_TRANSPORT_H */